Water bottle cap



FIG. 1 is a front, right and top perspective view of a water bottle cap, showing my design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of the water bottle cap when in use.

The broken lines showin in FIGS. 1-7 depict portions of the water bottle cap that form no part of the claimed design. The broken lines shown in FIG. 8 depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a water bottle cap, as shown and described. 